如何指定或判断当前编译架构

"externalNativeOptions": { 
  "path": "./src/main/cpp/CMakeLists.txt", 
  "arguments": "", 
  "cppFlags": "", 
  "abiFilters": [ 
    "arm64-v8a" 
  ] 
}
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-DOHOS_ARCH=armeabi-v7a
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if (${OHOS_ARCH} STREQUAL "armeabi-v7a") 
message('armeabi-v7a') 
elseif (${OHOS_ARCH} STREQUAL "arm64-v8a") 
message('arm64-v8a') 
else() 
message("unkonow") 
endif()
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